
Quiz z Wprowadzenia do SQL: DDL i DML
Authored by Jerzy Kwiatkowski
Computers
9th Grade
Used 4+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jakie instrukcje są podstawowymi instrukcjami DDL?
JOIN, UNION, INTERSECT
SELECT, INSERT, UPDATE
CREATE, ALTER, DROP
WHERE, GROUP BY, ORDER BY
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Co robi instrukcja CREATE w SQL?
Tworzy obiekty
Zamienia nazwy obiektów
Usuwa tabelę
Modyfikuje obiekty
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jakie typy danych można zdefiniować w instrukcji CREATE?
BOOLEAN, SET, ENUM
FLOAT, DOUBLE, CHAR
TEXT, BLOB, JSON
INT, VARCHAR, DATE
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Co oznacza PRIMARY KEY w kontekście tabeli?
Ograniczenie unikalności
Typ danych
Klucz obcy łączący tabele
Klucz główny identyfikujący rekordy
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jaką funkcję pełni instrukcja ALTER?
Usuwa dane z tabeli
Zamienia nazwy obiektów
Modyfikuje istniejące obiekty
Tworzy nowe obiekty
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Co się stanie, gdy użyjemy instrukcji DROP?
Zamiana nazwy tabeli
Modyfikacja tabeli
Usunięcie tabeli i danych
Usunięcie tylko danych
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jakie ograniczenie można dodać do kolumny w tabeli?
WHERE
PRIMARY KEY
SELECT
JOIN
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